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我想构建一个以键为时间戳的数组，由于某种原因，当我手动构建它时它可以工作，但是当我尝试合并一个新项目时它不起作用。

我读到合并的最快方法是：array[]，但它在键前添加了一个索引 [0],[1]，我也需要找到解决这个问题的方法。因为我需要通过时间戳访问密钥。

$timeStamp=mktime(0, 0, 0, date("m"), date("d"), date("Y"));

$maxCapArray=array();

// IDEAL MERGING BUT NOT WORKING: $maxCapArray[]= $timeStamp => array('Book'=>'BLABLA','Author'=>'BLOBLO');

// (string) NOT WORKING: $maxCapArray[]= (string)$timeStamp => array('Book'=>'BLABLA','Author'=>'BLUBLU');

$maxCapArray = array($timeStamp => array('Book'=>'BLABLA','Author'=>'BLEBLE')); $maxCapArray = array($timeStamp => array('Book'=>'BLABLA','Author'=>'BLIBLI'));

// MANUALLY ONLY TAKES THE LAST ITEM:

echo $maxCapArray[$timeStamp]['Author'];

任何帮助将不胜感激。

4

3 回答 3

1

您不能添加像$maxCapArray[]= $timeStamp => array('Book'=>'BLABLA','Author'=>'BLOBLO');.

  • 你可以这样做：

    $v=数组（）；
    $v[]=array("a"=>array(1,2,3));

这将得到：

print_r($v);
Array ( [0] => Array ( [a] => Array ( [0] => 1 [1] => 2 [2] => 3 ) ) )

  • 或这个：

    $v["a"]=数组(1,2,3);

这将得到：

print_r($v);
Array ( [a] => Array ( [0] => 1 [1] => 2 [2] => 3 ) )
于 2013-02-25T10:20:01.753 回答
1

目前尚不清楚您最终需要什么结构。

我想你可能需要这样的东西：

<?php

// initial an empty array
$maxCapArray=array();

// first run on a day
$timeStampA=mktime(0, 0, 0, date("m"), date("d"), date("Y"));
$maxCapArray[$timestampA] = array('Book'=>'BLABLA','Author'=>'BLEBLE');

// second run on a different day
$timeStampB=mktime(0, 0, 0, date("m"), date("d"), date("Y"));
$maxCapArray[$timestampB] = array('Book'=>'BLABLA','Author'=>'BLEBLE');

// third run on yet another day
$timeStampC=mktime(0, 0, 0, date("m"), date("d"), date("Y"));
$maxCapArray[$timestampC] = array('Book'=>'BLABLA','Author'=>'BLEBLE');

// ...

// to retrieve the Author of a given timestamp
echo $maxCapArray[$timestampA]['Author'];
echo $maxCapArray[$timestampB]['Author'];
echo $maxCapArray[$timestampC]['Author'];

?>

第一行将删除您之前获得的所有数据。请以合乎逻辑的方式使用它们。

另一个猜测：

<?php

// initial an empty array
$maxCapArray=array();
$timeStamp=mktime(0, 0, 0, date("m"), date("d"), date("Y"));

// suppose you want $maxCapArray[$timestamp]['Book'] and $maxCapArray[$timestamp]['author']
// to be arrays
if (!isset($maxCapArray[$timestamp])) $maxCapArray[$timestamp] = array();
$maxCapArray[$timestamp]['Book'][]   = 'BLABLA';
$maxCapArray[$timestamp]['Author'][] = 'BLEBLE';

$maxCapArray[$timestamp]['Book'][]   = 'BLABLA 2';
$maxCapArray[$timestamp]['Author'][] = 'BLEBLE 2';

// ...

// you should get an array:
var_dump($maxCapArray[$timestamp]['Author']);

?>

更新：看来你正在寻找这个

<?php

// initial an empty array
$maxCapArray=array();
$timeStamp=mktime(0, 0, 0, date("m"), date("d"), date("Y"));

// suppose you want $maxCapArray[$timestamp]['Book'] and $maxCapArray[$timestamp]['author']
// to be arrays
if (!isset($maxCapArray[$timestamp])) $maxCapArray[$timestamp] = array();
$maxCapArray[$timestamp]['Author']['Book 1'] = 'Author 1';
$maxCapArray[$timestamp]['Author']['Book 2'] = 'Author 2';
$maxCapArray[$timestamp]['Author']['Book 3'] = 'Author 2';

// ...

// review your array:
var_dump($maxCapArray[$timestamp]['Author']);

// retrieve
$author_name = 'Author A';
$book_name = 'Book 1';
echo $maxCapArray[$timestamp][$author_name][$book_name];

?>

更多建议

数组仅针对 1 种特定情况执行索引结构。几天后，您可能需要另一个。也许您需要按书搜索作者，或按书搜索时间戳。谁知道？

我建议您在这些情况下使用关系数据库。您可以在 MySQL 中创建一个数据库表，如下所示：

+-----------+---------------------+------------------------------------------+---------------------+
| record_id | author              | book                                     | timestamp           |
+-----------+---------------------+------------------------------------------+---------------------+
| 1         | Jules Verne         | Twenty Thousand Leagues Under the Sea    | 2013-01-12 12:24:00 |
| 2         | Jules Verne         | Journey to the Center of the Earth       | 2013-01-12 13:01:00 |
| 3         | William Shakespeare | Hamlet                                   | 2013-01-12 16:51:00 |
+-----------+---------------------+------------------------------------------+---------------------+

MySQL 会自动完成所有的索引工作。

然后当您需要数据时，您可以连接到数据库并读取：

<?php

// connect to 
mysql_connect('localhost', 'db_user', 'db_password');
mysql_select_db('library_database');

// ask database of books of a certain timestamp and of certain author
$results = mysql_query('SELECT author FROM book_records WHERE 
  timestamp="2013-01-12 13:01:00" AND book="Journey to the Center of the Earth"');

// read the database's answer to $books array
$authors = array();
while (($row = mysql_fetch_assoc($results)) != FALSE) {
  $authors = $row['author'];
}

// you may examine the array here
// this is a list of author of the specific timestamp
// and of specific book
var_dump($authors);

?>

如果您有其他需要，您可以更改代码：

<?php

// connect to 
mysql_connect('localhost', 'db_user', 'db_password');
mysql_select_db('library_database');


// if you want to have all the timestamp of a book and an author
// you may just do this
$results = mysql_query('SELECT timestamp FROM book_records WHERE 
  author="Jules Verne" AND book="Journey to the Center of the Earth"');


// read the database's answer to $books array
$timestamps = array();
while (($row = mysql_fetch_assoc($results)) != FALSE) {
  $timestamps = $row['timestamp'];
}

// this is the list of related timestamp
var_dump($timestamps);

?>
于 2013-02-25T10:22:24.560 回答
0

你可能正在寻找这个：

$timeStamp = mktime(0, 0, 0, date("m"), date("d"), date("Y"));
$maxCapArray = array();

$maxCapArray[$timeStamp] = array();
$maxCapArray[$timeStamp][] = array('Book'=>'BLABLA','Author'=>'BLEBLE');
$maxCapArray[$timeStamp][] = array('Book'=>'BLABLA','Author'=>'BLIBLI');

echo $maxCapArray[$timeStamp][0]['Author']; // == BLEBLE

请注意，如果您用于array_merge()合并数字索引数组，则键将从零开始重新索引，请参阅http://php.net/manual/en/function.array-merge.php

于 2013-02-25T10:26:26.897 回答